Car brake



Sept. 22, 1931. H. c. DoRRls E'r AL CAR BRAKE Filed Aug. 21, 1929 3 Sheets-Sheet l L Uw: -..EN

gmanow a d fill ffals ma: I

akker at Sept. 22, 1931. H. c, DoRRls E'r Al. 1,323,888

CAR BRAKE Filed Aug. 21, 1929 5 sheets-sheet 2 Hear' 610011115' y f/fjgy am g Sept' 22, l931. H. c. DoRRls E1' AL 1,823,888

CAR BRAKE Filed Aug. 2l, 1929 5 Sheets-Sheet 3 memtow e C. Zal/als Patented Sept. 22, 1931 STATES P TENr OFFICE i i HENRY c. Domus' AND LINDSAY o. PRITNER, or" JOHNSTOWN, PENNSYLVANIA, As;

SIGNORS To BETHLEHEM STEEL ooMPANY', A coR-PonATIoN OF PENNSYLVANIA GARY BRAKE. Y

Application filed Augustm, 1929. serial-Na 387,411;v i

Our invention relates to new and useful improvements in car brakes and is adaptedV more particularly for use in connection with mine cars and for similar small cars 4of this 53 type.

Heretofore when resilient steel brake bands have been usedit has been the usual practice to immovably anchor thebands on one side of the wheels to the car body while Ui the bands on the opposite side of the wheels are connected to the brake actuating mechaA nism for setting or releasing the brakes. When the brake bands are mounted in this manner it has been found that the brake bands and shoes, if they have sepa-rate shoes mounted thereon do not contact properly especially after the brake shoes orbands become worn and that they will only engage or Contact with the tread of the wheelon that vfgysirlm of the wheels on which the actuating mechanism therefor is attached. Our invention obviates this diiiiculty.

One of the objects of our inventionis to provide a brake having resilient steel brake zbands, the ends of which are movably held and manipulated in such a manner as to allow the band when forced downward when the brakes are set to frictionally engage the tread of the wheels, to automatically adjust 9T itself and equalize the pressure ofthe shoes of the brake bands on the wheels.

Another object of our invention relates to formingthe sliding or floating connections between the car body and the brake bands in 35i such a manner as to allow the brake bands whenk the brakes are set to-.engage the en# tire frictional face of the brake shoes or bands, or whenthe brakes are released allowing the brake bands -to float and to be 4.65 raised out of frictiona-l engagement withL the tread of wheels.

Another object of our invention relates to the manner of mounting the brake ybands so that when the brake bands are set in l1.5applying the brakes the pressure will be our invention, we will now, in order to make the matter moreclear, referto the accom@ panying three sheets of drawings which formrpart of this specification and in which like characters referto like parts:

Fig..l lL isv atop plan view of a minecar embodying our invention;- 1 Fig. 2 is aside elevation of the car shown iHFia-.i f c i 3 is an end elevation of the car; w Fig. et isan enlarged detail in side elevation illustrating more clearly one of the brake bands applied tothe treadzof a wheel and the connections forthe ends of the'brake lands between the carbody and the brake er.; i Fig A5 isadetailhtop `plan View of one of the brake bands, illustrating .the end con? HeQtOHS; i f

ig. 6 is a s ide elevation'of a portion of a car showinga modification; and

Fig. Z is a vertical transverse section taken on the line 7-7 of Fig. 6.

Referring now to 'the characters of. reference on the drawings: The numeral leindicatesthe ycar body having wheel vhood sheets 2 which extend upwardly from the floor of thecar and are open tothe side of the car to give access to wheels 8, and braking .mechanism asshown in Figs. l, 2, 6 and 7 vResilient steel brake bands 4, each having a liningv or shoe 5 of vsoft steel or other fric tional material are adapted to bel applied frictionally against the upper side of the.. tread surfacek ofthe wheels, one end of eachy brake band t is bent angularly' and formed into anelongated eye 6 and attached to the producing an efthe brake band is also bifurcated as at 12 for receiving the end of the brake-bar 13 which is attached to the end 1() of the brake band by means of a bolt 14 to form a hinge joint. A clevis 15 has its lower end attached to the brake-bar 13 by means of a bolt 16, while the upper end of said clevis 15 is pivoted as at 17 to the inner crank arm end 18 of theV rock-shaft 19. Rock-shaft 19 is mounted on the under side of the car body by means of bearings 20 and 21 and support 22 and is held against longitudinal movement by the collars' 23 and 24 formed integral therewith which-are adapted to engage the sides of bearing 20 and support 22. The outer end of rockshaft 19 projects beyond the end of the car. and is formed with a crank arm 25 bent at' right angles to the body of the rock-shaft and also at an angle of substantially to the crank arm 18. The end of crank arm 2is flattened and pivoted 'as at 26 to the endl of a short rod connection 27, the oposite end'of which is pivoted as at28 to the lower end of brake lever 29, which is fulcrumed as at 30 on the bracket 31v attached tothe car end. Brake lever 29y has a tooth 32 formed integral therewith adaptedv to engage a toothed rack 33 secured to the car end. Above'the lfulcrum point 30 `at a distance equal therefrom to the pivotal point 28'isl pivoted as at 34 a long connecting rod 35 which has its opposite end attached to another crank arm 36 of the rock-shaft 37 mounted on the opposite side of the car torock-'shaft 19, to which is attached by means ofthe crank end 38 an-, other brake rigging similar to the one just described and the same reference numerals will apply thereto.V Although we have il-' cal spring 39 is attached totl'iejtangentialv end of each of the brake bands by means of a clip 40 while the opposite end is secured by means of a'bracket 41'to the car body and in order vto adjust the tension yof the spring a numberof holes 42' are formed in the 'downwardly extending leg of the bracket 41 in which the hooked end of the spring 39 is secured to @five` greater or less tension to the spring. (D) y the same as described for Figs.V 1 to- 5.

The operationof the braking mechanism is asfollows: Assuming that the par-ts are in the position shown in the drawings which is the position they will assume `when the brakes are set or in frictional engagement therwise the construction isv with the upper side of the wheel treads, the operator grasps the handle of the brake lever 29 and releases the tooth 32 from the rack 33 and then swings the brake lever 29 from right to left a sufficient distance to release the brake bands andVv then allows it to beA locked by the tooth 32 reengaging the rack 33 thereby rotating the rock-shafts 19 and 37 through the connecting rods 27 and 35 which is connected to the crank arms 25 and 36. Both of the crank arms 25 and 36 will be rotated oppositely towards the outside of the car as it will be noted that both of the'rock-sha'fts 19 and 37 are of similar construction but are made right and lelt. As the rock-shafts 19 and 37 are rotated, crank arms 18 and 38 which when the brakes are set aresubstantially horizontal will both rotate upwardly' and outwardly thereby releasing the brake bands and shoes from the -wheels, at the same time the opposite ends of the brake bands each having the elongated eye formed therein allows the brake bands to slide or float and release lthemselves from the entire tread engaging surface of the wheels. Vhen-it is desired to reset the brakes the lever 29 is swung from left to right and the operation is reversed.

Although we have described and illustrated our invention in considerable detail, we do not wish to be limited to the exact and specific details thereof, as shown and described, but may use such modifications in, substitutions for, or equivalents thereof, as are embraced within the scope of our invention or as pointed out in the claims.

Having thus described our invention what weI claim as new and desire to secure by Letters Patent is:

1. The combination with a car body and a wheel at one side of the car, 'a rockshaft arranged parallel to and supported on the car body, a resilient brake band having one end slidably connected to Vthe car body adapted to slide longitudinally when the brakes are set or released, a ilexible connection between lthe rock-shaft andthe opposite end of the brake band, means for turning the rock-shaft, Vand means when the rocksha-ft is turned to vforce the brake band into or out of frictional engagement with the wheel. 2. The combination with a car body and a pair Vof wheels at one side of the car, a rock-shaftV arranged parallel to and supported on they car body, a resilientV brake band for each wheel having'one end slidably connected to the car body adapted to slide longitudinally when the brakes are set or released, ,a brake bar pivotally connecting the'opposite ends of a pair of the brake bands together, a fleXi le connection between the 4rock-shaft and the brake band, a brake levergconnectedto the rock-,shaft for turning said rock-shaft, and means when the Leasgse's rock-shaftis turned to yforce the brakebands into or out of frictional engagement with the wheels. n

3. The combination with 'a car body and a pair of wheels at one side of theecar, a rock-shaft arranged parallel to and supported on the car body, a crank arm formed on the inner and outer ends of the rockshaft, a resilient brake band for each wheel, a vertically movable pivotal connection'for` connecting together the inner ends of each brake band, means for sliding the outer :ends

of the brake bands, a brake bar for connect-V crank arm on the outer end of the rock-shaft" adapted for turning said rock-shaft,A andY means when the rock-shaftis turned to force the brake A bands into or o-ut of frictional engagement with the wheels.

4. The combination with a car body anc a pair of wheels at one side of the car, a. rock-V shaft arranged parallel to and supported on the car body, a crank arm formed on the inner and outer ends of the rock-shaft,v means for holding the rock-shaft againsty longitudinal' movement, a resilient brake band for each Wheel, an elongated eye formed in one end of each brake band',

brackets mounted on the car body, a'bolt extending through the elongated eye vandV brackets adapted to form a slidable connectionl for the end of the brake band, a verti-V cally movable brake bar for pivotally connecting the two opposite ends of the brake bands together for each pair of wheelsat one side of the car, a swivel connection between the inner crank arm of the rock-shaft and the brake bar, a brake lever lconnected to the crank arm on the outer end of the L rock-shaft adapted for turning said rock-4 shaft, and means when ythe rock-shaft is turned to force the brake bands into or -ont of frictional engagementwith the wheels.

5. The combination with a car body and" a wheel at one side of the car, a `resilient brake band mounted above the Wheel tread and having one end longitudinally slidably connected to the car body, and vertically movable pivotal means attached to the o-pposite end of the brake band to force the brake bands into or out of frictional engagement with the wheel.

6. The combination With a car body and a pair of wheels at one side of the car, a rock-shaft arranged parallel to and supported on the car bottom, a crank arm formed on the inner and outer ends of the rock-shaft, collars on the rock-shaft for holding said shafts against longitudinal movement, a resilient brake band for each wheel each having a lining secured thereto, means for slidably mounting one end of each brake fband'on the` cai'v body, a brakefba'r` for connecting"thefopposite ends of 'the Atwo'v brake'y bands l together to form a hinge joint, 1 a swivel connection between'the inner crank/ turnedto' force thel brake bands into or out e of frictional engagementV with the wheels. 7. Thev combination witha car body and a pair of wheels at one-'side 'ofthe car,-a

resilient' vbrake bandl for engaging the top'y tread surface of each wheel,means for slidably connecting the outer endv of each brake band to the car `body and'vhorizontally movable thereto wlien the-brakes are set orreleased, a --vertically movablebrake-bar for connectingthe two linner ends of theV brake bands together, and means connected to the brake bar adapted to'force thebrake bands into or out of frictional engagement with the wheels. y 8.l The combination with a car bodyand a pair vof 'Wheels at'oneside ofthe car, a-resilient Vbrakefband for engaging the top tread surface of each wheel, a slidable connection for the outer yend of each brakey band on the car body, a verticallyV movable brake bar for conn'ectiing' the two inner ends of the brake bands together between-the wheels, a rock-shaft arrangedparallel yto and `supported -on the vcar bottom,l a crank arm' formed onthe innerand-'outer ends of the rock-shaft, a swivel connection between the inner crank arm of the-rock-shaft and theV bralebar,"a brake Vlever connected to the crank arm` on the outer end of the' rockmove the brake bands into or out of frictional engagementl with the' wheels.

"9. Tliecombination with a car body and afpairof'-wh`eelsat each side of the car, a resilient brake band'forl engaging the topf tread surface'of each wheel, a slidableconnectionfor theouterend of each brake band on the car body, a brake bar for pivotally connecting the twoV inner ends of 'each pair of the'brake bands together between each pair of wheels on each side of the car, a rockshaft 'for eachpair of brake bands arranged parallel to and supported on the car bottom', al swivel: connection between each brake barv and the rockshaft' on each side of the`V car, and, means adaptedl to simultaneously rotate eaclirock-sh'aft to Hmove the brake bands into or eut of frictional engagement with the'wh'eels. I i i y 10. Th'e'combination with-a car body'and pairfof wheelsateachfside'of the car, a brake'band forengaging theptop tread sur-` face of'each Wheel-l arranged in 'pairs on 'each .105, shaft adapted for turning said rocl'cshaft,v and means when'the rock-shaft is turned to side of thefcar, a slidable connection forthe outer end of each brake band on the .car body, a brakebar for pivotally connecting the two inner. ends yof each pair of brakeA *,bands together between each pair of wheels,

a rock-shaft for each pair of brake bands arranged parallel to and supported on the car bottom near eachv side thereof, a crank arm formed on the inner and outer ends of each fof the rock-shafts, a vswivel connection be-` tween each of theV inner crank arms of the rock-shafts and the brake bar, a brake lever connectedto the crank arm on the outer end of each rock-shaft adapted to simultaneously rotate -each rock-shaft to move the brake bands into or out of frietional engagement with the wheels. Y Y 11.- The combination with a car body and a wheel aty one side of the car, a resilient n-='-;bra`ke band mounted above the wheel tread and having one, end slidably connected to the car body adapted for horizontal movement in relation thereto, pivotal means attached to the opposite end of-the brake band to 2'5;move the end of the brake band vertically into or out of frictional engagement with the wheel, and a resilient connection between the car body and the brake band adapted to assist in moving the brake band out of frietional engagement with the tread of the wheel.

` 12. The combination with a car body and a pair of wheels at one side of the car, a re-` silient ,brake band mounted above each jjwheel tread having their outer ends slidably connected to the car body, a brake bar for pivotally connecting the opposite inner ends of the two brake bands together, a rockshaft arranged parallel to and supported on f the car bottom, a crank arm formed on the inner and outer ends of the rock-shaft, a swivel connection between the crank arm on the inner end of the rock-shaft and the brake bar, a brake lever attached to the crank arm f y on the outer end ofthe rock-shaft adapted to rotate the rock-shaft, spring connections between the car body and the brake Vbands adapted to assist in moving the brake bands out of frictionalengagement withthe tread of 56; the wheels, and means for adjusting the tensionv of the springs.

13. The combination with a car body and a pair of wheels at each side of the car, a brake band mounted above each wheel adapt- 55'.; ed for engaging thetop tread surface of each wheeland arranged in pairs on each side of the car, a slidable connection for the outer end of each brake band on the car body, a brake bar for pivotally connecting 60;' the two inner ends of each pair of brake bands together between each pair of wheels on each side of the car, a rock-shaft arranged parallel to and supported on the car bottom near each side'thereof, a crank arm a5 formed on the inner end of` each rock-shaft,

a cranky arm formed onthe outer end of eachA rock-shaft extending at `an angle to the crank arm formed on the inner end of said shaft, a swivel connection between each of the inner crankarmsof the rock-shaftsand the brake bar, a brake lever pivotally mounted on the car end, a connecting rod between the brake levervand each ofthe crank arms on the outer ends of the rock-shafts, a tooth on the brake lever, a rack secured to the car end having notches thereon adapted to be engaged by the tooth of the brake lever to hold the brakes in their set positions, and means by the operation of the brake lever adapted to simultaneously rotate each rockshaft to move the brake bands into or out of frictional engagement with the wheels. Y

14. The combination with a car body and a pair of wheels at each side of the car, a brake band mountedv above each wheel adapted for engaging the top tread surface of each wheel arranged in pairs on each side of the car, a slidable connection for the outer end of each `brake band on the car body, a brake bar for pivotally vconnecting the two innerl ends of each pair of brake bands together to form a hinged joint between each pair of wheels on each side ofthe car, a rock-shaft arranged` parallel to and supported in bearings on the car bottom near each side thereof, means for holding the rocleshafts against longitudinal, movement, a crank arm formed on the inner end of each rock-shaft, a` crank arm formed on the outer end of each rock-shaft, a swivelvgconnection between each of the inner crank arms of the rock-shafts` and the central portion of the brake bars, a brake lever pivotallyv mounted on the car end for operating the brake rigging, a connecting rod between the brake lever and each of the crank arms on the outer ends of the rock-shafts, means for holding the brake lever in their set positions, means whenY the brake lever is operated to simultaneously rotate each rockshaft, and means by the action of the rockshaft when the brakes are set for distributing an equal pressure betweenthe brake bands on the wheels. A i l In testimony whereof we hereunto aiix our signatures. i

HENRY C. DORRIS. e LINDSAY Cy.. PRITNER.

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